Right now
The most recent data we hold from NOAA arrived 28 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 28 June 2026 at 19:15 UTC. It is kept here as a record.
It is the 22nd strongest of the 42 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 28 at 1:55PM CDT until June 28 at 2:15PM CDT by NWS Quad Cities IA IL
Urban PEI: 26,064 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- June 29, 2026 · score 40 · 2.9 km
- August 14, 2026 · score 43 · 18.0 km
- August 3, 2026 · score 37 · 18.0 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 34 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 34 / 100 |
| Legacy data-support index | 0.85/1 |
| Coordinates | 41.9750, -90.5850 |
| Nearest City | Clinton (36 km) |
| Urban exposure index (PEI) | 26.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-28T18:55:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5590d59813858c193c1522a594cc7b67e7733a34.001.1 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-28T18:55:00.000Z.
First archived: 2026-06-28T19:05:34.647Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clinton, IA; Jackson, IA |
| Headline | Severe Thunderstorm Warning issued June 28 at 1:55PM CDT until June 28 at 2:15PM CDT by NWS Quad Cities IA IL |
| Expires | 2026-06-28T14:15:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| Iem TypeSummary | R |
| Iem Magnitude | 0.48 |
| Iem Unit | Inch |
| Iem City | 2 ESE Fairview |
| Iem County | Jones |
| Iem State | IA |
| Iem Wfo | DVN |
| Iem Remark | rain fell in 15 min. |
| MergedSources | [{"id":"iem_R_42.080_-91.300_1782671100000","source":"iem","severity":"low","severityValue":25,"timestamp":1782671100000,"latitude":42.08,"longitude":-91.3}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
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